A062609 Numbers k such that 43^k - 42^k is prime or a strong pseudoprime.

3, 13, 43, 211

Offset: 1

Author

Mike Oakes, May 18 2001, May 19 2001

Keywords

• nonn
• hard

Comments

a(5) > 10^5 - Robert Price, Dec 24 2012

Crossrefs

Cf. A000043, A057468, A059801-A059803, A062572-A062608, A215632, A062611-A062666.

Programs

PARI

forprime(n=1, 9999, ispseudoprime(43^n-42^n) && print1(n", ")) \\ - M. F. Hasler, Sep 21 2013

Extensions

Edited by M. F. Hasler, Sep 21 2013